2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/52328Non-uniform black strings in the two-brane system are investigated using the effective action approach. It is shown that the radion acts as a non-trivial hair of black strings. The stability of solutions is demonstrated using the catastrophe theory. The black strings are shown to be non-uniform.4 pages, 3 figures, contribution to the proceedings of the 13th JGRGHigh Energy Physics - Theorytext